Core bar



Feb. 15, 1921.

J. E. PERRY GORE BAR 3 Sheets-Sheety 'l HWS Mw ATTORNEY '1,618,130 J. E.PERRY Feb. 15

CORE BAR- Filed April 27, 1925 3 Sheets-Sheet 2 Z 74' 3k/,571.9 INVENTORgfz fjrry Feb. 15,1927. 1,618,130

J. E. PERRY com: BAR` :s sheets-sheet s Find April 27, 1925 jy 70l 1a 17Z @if INVENTOR .fo/mfflrry,

. "JOHN nDMn-nn PERRY, 'or strapon, .ssrmsYLvaNL/a, Assistme ro VALLEYivroutn a oFsHenPsvrLLn, PnNNsYLya-Nre, ye.colar('mnu'.fro1`v,or NewIRON ooRPoRATroiv,

Yoan. f

- '-figelene vcons Ban.

. 4Applicaties.meerspin 27,1925.' sensing. 245364.

-I'lhis invention relates Ibroadly to-,metal lurgyand Ymoreespecially toa collapsible core bar pa-rtif'zularly adapted forthe cast@ :"5Varioustypes of core bars have heretoforeV been proposed to 'facilitatethe removalv of thev bar when stripping theinold, and to this-1end,-.various collapsible constructions have been designed, but `1nsuch collapsible struc- 10 tures a slidingmovement of the core barrelative to the inside wall of the casting has side walls of the presentcore bar are spaced from the cone or central post in such manner as'y toprovide passage ,waysy through which the mold gases may freely escape,2.5 thereby producing a'better surface on the interior` of the casting'andalso permitting the cooling down of the cast mold on'the interiorthereof atrthe proper rate to produce proper stress conditionsconducivev to a long lived ingot mold.

Another feature of the present invention is the formation of the ventholes in the side plates in such manner as to support the mold sandcarried by these sideplates.

lith the present invention7 cast molds may be stripped earlier than ispossible where core bars are-used which require la sliding movementbetween the core b-ar and Athe ingot mold, because Where such' prior arttypes of core bars are used therc isa liability of cra-cking ordisturbingf theiuner skink of the ingot mold unless the mold ispermitted to thoroughly cool or harden. be.- itore the strippingoperation occurs. This tends: to tie upl equipment and slowsfupn'lanufactu'ring operations.

ont Vcore bar, the bar maybe collapsed as quickly as the cast moldkishardened suflif'iently so that the mold'will not bleed. This isbecause ofthe Vfact that 'in stripping the present' core bar the sidewalls of the'bar move directly inwardly Vso that. they merely take awaythe supporting surface from bef hind the niold'sand and do not slidelonni- ,tudinally relatively tot1 ne mold side walls Y ried by astationary supportingr column. With thepresduring theninitiallreleasingiactioni'.v This i 'releases' .equipment `for yfurther manufacture andalsofacilitates cooling of the mold. The principal object'ofthe presentinvention isa the manufacture of ingot molds and con- I structed invsuch manner thatthe controlling bar. or cone bar may be moved lto permitcollapsing ofthe side plates without anfinif tial longitudinal.;rmovement ofthe 'side plates. Another objectof thek present invention,is a core bar provided with venting spaces back of the side plates insuchy mannerV as to vent the moldgases through the interior of the corebar,- vand also where desired to permitan air How through the core'ibar.A .A still further object of fthe present invention is a core barprovided with vent open# ings inthe side plates constructed in suchmanner so as to support themold sandfduri lingr the-set up4 and at the`same time permit thereof are provided :with longitudinal strengtheningribs to prevent warping of said plates when said corebaris sub]ected tothe intense heat of molten metal'during I casting operations; I l y.

A still further object'ofthe presentjin# vention is `a core bar ofthelcharacter specii lied in which longitudinal ribs on the side plates aresupported. by transverse kbars whichicooperate with control wedgesonthecontrol bar whereby said' side plates ares'olidly.. supported duringTcasting operation1 and whereby each side plate is independently 9supported.- f Y i i yillnotherfand further object of this pres'-y entinvention is .a core barin which both the side plates and thecontrolcone are ,car-

10.0 l Realizing that the present invention may be embodied vinconstructions otherl .than those, specifically disclosed hereavitllav itis desiredvthat this disclosurev shall befconi sidered-as illustra-tiveand not-.in the limit-- ine sense.n i j `Throughout* the dravvin ,gsvlike. designated by likeV characters.;l

'Figure 1 isgan elevational view ofi-the parts are preferred of the corebar seten asset; .ne

collapsible corebar adapted forno los hase Vand'showing thevent openingsin the top and side plates.

Figure 2 is asectional vieWon line 2 2 i of Figure 4.

FigureGis ay detail view illustrating vent openings. Y Y

Y Figure 71s a section "on line 7-7 ot Figo-l cured.'v Y

Figure 8 is a detail view illustrating` the arrangement ot' ventopenings at the corners i @fiile sie@ pines.

Figure 9 s a section on line ot Figure 8.

Figure 10 is ak top plan view of the device shown in Figure 1.

Y Figure fif's afhottom plan view ol the core bar shown in Figure 1.

The preferred embodiment of the present inventioncornprises acollapsihlel core har which isbuilt around and upon a supporting column1,` that is hollow, and in the preferred form hasafcross-sect-ion of thegeni eral shape of a Greek cross. In the 4form shown, the cross-sectionot' the complete core bar isrectangular, andthe supporting columnfistherefore, longer than it is wide. Openings2 are provided atv suitableintervals through the end extensions 4. ,ln the illustratedconstruction, there yare three of these oper'iing's.y These openings areadapted to receive expansion hars and to permit a limited movement otthese hars toward and from theaxis'of the core 'bar Wherehy theexpansionior collapseot the 'core'har is controlled, as will be latereXi plained. rIVhese l expansion hars 5 are i'nountedv on projections 6extending' from the outer side plates 7, which projections enclosev theend extensions 4. Suitable bolts 8 may be utilized for attaching theexpansionhars 5to the side plates 7. The outer side `plates"7,areprovided with longitudinally extending rios 9 that extend the completelength ofthe side plates and serve as strengtheningmembers to preventWarpingf of the plates'and also as means tor transmitting' forcesactingv on theexpansion hars to the'entire-side plates. The edges of theside plates are curved as at 10 to. form coi.'- ners of the core har. si

VThe side portions vof thelsupporting col umn 1 are pierced b y pairs ofopenings 11 through .which projections l21rom the inner lside plates 14extend. 'These' projections 12 carry expansion hars 15, which aresuitahly bolted to theinner side plates 14 to rigidly interlock with thesaine. These inner Vside plates 14 are 'likewise provided jWithlongitudinally extending ribs A16 for the same purpose as the similarribs on side lplates 7. The edges ot the inner side plates 14 are curvedas at 17 and adapted to lockv under .the corner projections 10,011the'outer side ing'memhers which securely V.interlock both pairs of sideplates to the supportingz),` column and prevent endwise movement o't theside plates relatively to the supporting column.

A controlling cone or Wedge member 18y is mounted Within 'the hollowinthe support# ing colun'in and in cross-'sectionis similar to thesl'iape 0iE the 'cross-section of the column so that this supporting haror control cone conforms to thel shapeo't the column and thesurtaces atthel corners 19 are sub# stantially parallel and cooperate 'Wit-l1similar substantially parallel corners 20 forming` the inner projecting'corners ot the supportingcolumn 1. This construction permits of alongitudinal movement yot the controlling cone or Wedge member in thesupportingn column. The faces 21 on the control cone 18 are inclined inopposite directions and toward the'axis of the controllingl cone. These'faces are adapted to engage the expansion hars 5 While'the faces 22 onthe controlling cone 18, and i'vhich are similarly oppositely inclinedtoiva'rd the axis of the core har7 cooperate with the expansion hars 15.lVh'ere desired. the inclination on the faces 22 mayv he slightlyvgreater than the inclination on the faces 21 so that the inner sideplatesV 14 may be r'ilievedr ata slightly7 greater rate than the outerside plates7 to permit properclearanc'e between the corners 10 and thecurved edges 17. rllhe control cone 18 'preferahlyis provided with aVentilatingopeningv 2B which leads to openings 24 in the top ojf thecontrol cone and the sideplates 7 and'14 are spaced a sujlncientdistance trom'the supporting; column 1 to provide lf'ingitudinalventilatinfr conduits 25 whereby proper ventilation isV at all timesprovided :tor the entire core har structure. 'lllietcj'i oit thesupporting column 1 is provided 'with a head 26 toi-ined With guide l1..

2,7 which guide the upper` end of the control Vc-one V18.ieiitilatii'ip; Vspaces 28 are provided between the lugs 27 and thesespaces lead tothe interior ot the corehar. This head is also Eformedwith an overhangr 29. which promet-s moldfsand from lling' up theventlatinc: spaces inA the core har 'when the har is being' covered'with sand by ramminn thesand around the saine in a suitable core box.rlhe top portion ot the head2@ serves a A'support for the Wedge key 30,whichmay herdriven through a suitable opening in the extension 31 torm-Iing the handle to the core bar on-the upper end ofthe controlling cone18. Vhenthis 4wedge'key 30 is driven inl-place, the side plates Tand 14kare wedged outwardly to their extreme' position and are securelyflocked` with, the core bar fu-lly expanded, so

\ cut, as at 32; k'This undercuttingand shortness of the side platespermits; sand to 'exe tend `slightly beneath the end of the sider l auplates andpcover the-same toprevent undue heating of ythe' side platesvby contact of` mjolten` metal therewith.` Thebase ofthe core bar isfilled in at the corners'34 of thebase of the'column 1 and forms anchorsfor bolts 35 that attach the base 36 to the Columnv 1 which'coinprisesthe support vfor the` core bar.4 This core bai' 'base 36 is adaptedto-seton the casting bottom land center the core bar inv the flask andmold, and is providedwith a draft opening 33 throughv which air'may beadmitted as desired to circulate through the conduit, 23 and out throughthe spaces 28.

y A feature'of the present invention is the formatioirand shape of the,vent holes 37 in the side plates and other portions ofV this core bar.These vent holes 37 preferably comprise a. substantially horizontalbottom portion 38 and a funnel-shaped mouth 39,

which may lead to a cylindricalopening 40. The funnel-shaped mouthiwithits upward inclination isV so arrangedV that when mold sand 'is rammedaround the core bar, the

Y sand 41 tendsto enter the vent opening and interlock the sand with theside plates. The inclination of the upper part of the mout-h of the ventopenings facilitates the entry of' the sand int-othe openings during theramminf; of the sand downwardly past the faces ofv the side plates orvbetween the faces of the side plates and a suitable core box, while thehorizontal portion of the vent openings acts to support =tlieysand andprevents its I dropping from the face plates. ,According to the presentvinvention lines of vent openings are arranged in the corners of theside plates and with the axes of these openings substantially directedtoward the longitudinal axis of the; corebar.. The most difficult.partof the corebar mold `sandto vent is that portion surrounding thecorner ofA the core bar,

and it has beenl found that this arrangement Y of corner openingseffectively vents this area. It will beY observed that in the presentconstruction each Vside plate isindependently supported in such mannerthat there is no tendency of an accidental general collapse of 'l thecore' bar when the metal begins to cool and iii'i'pose'compressionforces'upon the core bary when/thel corefbarI is 'in use. Further-kmore, it .will bev-observed that -fduring the collapsing ofl the corebarthe supporting column has no longitudinal movement. i The control cone18 is caused toreleasethefwedging action on the expansionTv barswhenvde- 'sired, thereby permitting the side plates 'to move inwardlytoward the Vlongitudinal axis of the core bar, and,` therefore'. theionly movement of the 'side plates during the' colforces on 'the` ingotmold thathasybeen cast .quickly carry off heated air. of mold` gasesformedfduring the useof the "core bar and i where `desired may permit anupward draught of cooled air to circulate through the core bai', whichtends to quickly cool down the core bar itself and t-he interior of thecasting whereby the core bar may beremovedmore quickly than heretoforepermis` sible thereby-releasing this equipment for more immediate usethan has heretofore been the practice. V

llaying thus described l claim isr- Y. y Y. l

1. Inv a collapsible core `bar, "the'combi nation ofv a supportingcolumn, a base seiny invention, what cured to said supporting column, aplurality of side plates adapted for to and fro movement relative to thevaxis of the supporting` column, and means within said supporting columnto control said to andfro movement of said side plates. v l l "l 2.substantially rectangular ingot molds, the combination of a base,` asupporting column, mounted on said base, a plurality ofzsubstantiallyHat side plates adaptedfor to and fro movement relative to the axis ofthe supporting column, and wedge means within said supporting column tocontrol sa id to and fro movement of said side plates, there beingindividual wedge means for each side plate'.

3. ln a core bai', the combination 'of a ,Supporting column providedwith openings in the side walls thereof, a plurality of movable sideplates carried by said supporting column, operating means attached tosaid side plates and extending through said opeiiings, a control'membermounted in said sup- `lapsing. actionk .in Aan inwardv bodily move? fment, which does not impose obgecti'onable' In a collapsible core barfor making Y porting columnV and operative upon said means tocontrolfthe movement of said 'side plates. 'Y l.

tilating means tor the body of the core bar.

5. VA core bar comprising a hollow supporting column, a plurality otmovable side plates carried by said supporting column, guide meansattached to said side plates and extending into the opening in saidhollow supporting column, a longitudinally movable controlling membercooperativek withsaid guide means to control the movement of said Y sideplates.

6. A'core bar yComprising a supporting column, a plurality ot movableside plates mounted on said column, guide lugs extending'trom said Asideplates through said supporting column, stop means carried by said' lugsand adapted to contact with the column to limit the outwardimovement otsaid plates and a control bar adapted to centrol the movement ot saidside'plates, and to look said side plates in their outermostpstoppedpositions.

V7. A core bar Comprising a supporting column, a plurality otinovable'side plates mounted o-n said column, guide lugs-extending fromsaid side plates through said supporting` column, stop means carried bysaid lugs and adapted to contact with the column to limit Vthe outwardmovement of said plates, and a wedge control bar adapted to act uponsaid means to Controll the movement ot said side plate, and a wedge keyoperative upon the control bar and the column to lool; said sideY platesin their outermost stopped positions;

8. A core bar comprising a supporting column, a plurality ot movableside plates carried by said supporting column, expansion bars on theinterior ot said column and Connected to said side plates, and alongitudinally movable control bar provided with wedge surfaces adaptedto contact with said expansion bars to torce said side plates outwardly.

9. A core bar comprising a supporting column, a.V plurality ot movableside plates carried by said supporting column, expansion bars on theinterior ot said eolun'inanil connected to said side plates, and alongitudinally movable control bar guided by the supportingc'olumn andprovided with wedge surfaces adapted to yContact with said ex;- pansionbars to torce said side plates outwardly.

'10. A core bar comprising afsupporting column, side plates relativelymovable to 'said supporting4 column, a 'movable wedge Yside platesoutwardly, and means tolock said side plates in their outermostpositions.

1.2.:A core vbar provided with a' hollow supporting column, a pluralityof side plates movabiy'mounted .upon said column, means to ,Control themovement of said side plates,

with and extending above the body ot said supporting column.

13. A core bar provided with a hollow supporting column, a plurality ofsider plates inovably mounted upon said column, longitudinal guide ribson thelsaidplates, means to control the movement .of said side plates,and a ventil ating chimney'portion connected with 'and extending abovethe body of' said supporting column. Y K,

il. A. core bar comprising a supporting colun'm, a' 'plurality otmovable'sid'e plates mounted upon said supporting column, said partsbeing constructed and arranged to provi le Ventilating spaces aroundsaid side plates and within said supporting column` and means to carryaway the mold gases arising through said ventilation openings.

l5. A core bar comprisinga hollen7 support-ing column, a base attachedto said supporting column and provided with an opening leading totheopening in said column, ahead chimney` portion upon said column andconnected with the interior thereoi','side plates spaced apart from saidsupportingcolumn to provide Ventilating 'spaces bacl of said ysideplates, said side plates being provided with vent openings leadingtoAsaid ventilating spaces, and conduits in the side wall oi' saidVsupporting' column to'lead said vent gases into'the interior ot saidsupporting veolumn and out through the chimney portion thereof.

i6. A core bar comprising a plurality ot vented sides, a hollow'ohiun'iey portion above said-vented sides, and means tor conductingmold gases from the bach oi said sides out through said chimney portion.

l?. A Core bar comprising a plurality ot sides providedwith ventopenings, a hollow head portion extending above said sides and a'Ventilating chimney portion connected provided lwitlra ventilationopening adapt- 18. A core bar comprising a plurality ot' vented sideplates, a base provided wltha ventilation opening, a top portionextending above said side plates andr being provided with a vent'ilatingconduit adapted to carry away mold gases.; driven into the in-V teriorof saidl core bar and to'permit an upward draught of air through thecore bar tofVV facilitate the discharge of said mold gases from Vtheinterior of said core bar.

195A core bar comprising ahollow sup! porting column, a plurality ofVvented side plates movably mounted ou said core bar, lugs extending fromsaid side plates through fthe side walls of said supporting column,

barsl within said column and mounted upon said lugs, a hollow slidingvwedge member'y cooperating `with said barsito control ythe uovementofvsaid side plates and clamp the bars against the interior of thecolumn, and

' a locking device to lock said partspin exportion, and means to providelateral move-A panded position.

20. A core bar comprising a supporting Column `providedwith a headportion form-V 'ing a protecting overhanging member, a plurality ofmovable side plates mounted beneath the overhanging parts of saidv headment of said side plates. y

2l. A core bar comprising a supporting` columnprovided with stop faces,a plurality of movable side plates'mounted upon said supporting column,expansion bars adapted to be 'brought against said stop faces to main#t-ain the side plates in expanded position, and means cooperative withsaid expansion bars to lock the same tightly against said stop faces. lA

22. A core bar comprising a stationary hollow supporting column providedwith stop faces, a. plurality of movable side plates mounted upon saidsupporting` column, expansion bars having portions `within the columnand adapted to be brought against said stop faces to maintain the sideAplates in expanded position, and slidable wedge means guided by thelcolumn and cooperativeV with said expansion bars to lock the sametightly against said stop faces.

237A core bar comprising a supporting column, a plurality of movableside plates supported 'by said column, stop faces on the interior ofsaid column, expansionbars conneted with'said side plates, and wedgemeans adapted to lock said expansion bars against the stop faces on theinterior of said supporting column.

24. A core bar comprising a hollow supe porting column, a plurality ofmovable side platesy guided by and supported by said column, stop faceson the interior of saidcolumn, expansion bars connected with said sideplates, and slidable wedge means'within said column and'adapted toloclrsaid expansionl bars against the stop faces on the interior of saidsupporting columnto securely hold the part-s in position duringv use.

Yity of g'uidingvribs adapted to 25. In a collapsible core bar, a base,and.

a plurality of movable side plates having their lower ends adjacent theVupper surfaceY ofsaid base, .said side plates being provided withunder-cut portions adjacent the lower ends thereof to form sandretaining recesses. 26. .A .collapsible core bar comprising a pluralityof movable side members, a control bar for operating said side members,a ventilating head surrounding the upper end of said control bar andprovided with a pluralv y guide the up-` per end of said Vcontrol bar. 5

27. As an article ofmanufacture, a support for a core bar comprisingside members provided with openingsfadapted to guide side plates andhaving an overhanging top portion comprising a chimney for carrying otl'mold gases when said-core bar isvin use. `28. A .core bar Vcomprising asupporting column, a plurality of movable side plates mounted on saidsupporting column, guiding means on saidsupporting column cooperatingwith guiding members on said side plates to guide said side platesduring theirinovement, a control member slidable in said sup* portingcolumn and adapted to be guided by said supporting column during itsmovement, and means for locking said control member in in their expandedrelation.

29. As an article ofmanufacture, a core bar having the sides thereofprovided with vent sand openings having the upper part position. to locksaid' sideplates y ing the upper. portion thereof extending outwardlyand upwardly and the lower portion ofgsaid openings being substantiallyhorizontal. l

31. As an article of manufacture, a core bar providedwith vent openingswith'the outer end thereof being substantially oval and the inner endbeing substantially circular. Y,

32. As an article of manufacture, a core bar provided with vent openingswith the `outer ends thereof enlarged to form sand retaining recesses. v

33. As an article of manufacture, a core bar pro-vided with a row ofvent openings in the corners thereof and with the outer ends thereofenlarged to formA sand retain-A ,ing recesses. f

34. As an A.article of manufacture, a core bar withvent openings 1n thecornersthereof Vand vwith the axes of the vent openings direct'ed towardthe axis of thecorebar.

y JOHN 'EDMUNDV PERRY.

